So I'm a huge ameatur at all this, and I've got my world, hand drawn/sketched (no artist) and being digitalized slowly. But before I get any further I need to work out my Tectonic plates, I thought I had a good understanding of these things (looked at many a guide even got out my old geography books xD), but it seems adding plates after designing the thing is much harder and all the guides I found were about designing with tectonic plates first.

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So, would those work? Please ignore rivers, artistic style and climates... for now

Thanks in advance!!